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\bibitem{2222} Marc Castello, Jordi Gonzalez, Ariel Amato, Pau Baiget, Carles Fernandez, Josep M. Gonfaus, et al. (2013). Exploiting Multimodal Interaction Techniques for Video-Surveillance. In \textit{Multimodal Interaction in Image and Video Applications Intelligent Systems Reference Library} (Vol. 48, pp. 135--151). Springer Berlin Heidelberg.

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